INDUCTION COIL FOR AN INDUCTION HEARING APPLIANCE

Description

[0001] The present invention relates to an induction cooking hob according to the preamble of claim 1.

[0002] An induction coil is provided for heating up ferromagnetic matter by eddy currents. In particular, the bottom of a cooking pot is made of ferromagnetic matter and heated up by the induction coil. The winding arrangement of the induction coil may have different shapes in order to satisfy geometric conditions.

[0003] Some special shapes of the winding arrangement of the induction coil result in portions with higher and lower winding concentrations. For example, if the ground area of the winding arrangement of the induction coil comprises one or more acute angles, the low winding concentrations occur in the portion of said acute angles. Different winding concentrations result in a nonuniform heat distribution in the ferromagnetic matter.

[0004] WO 93/04567 A1 discloses a griddle with induction coils and interchangeable griddle plates. The induction coil includes a low winding concentration in its inner portion and a high winding concentration in its out portion in order to obtain a magnetic field that maintains a uniform temperature across the surface of the griddle plate. The griddle plates include magnetically permeable materials having Curie temperatures which may be the same or different in order to provide different cooking temperatures.

[0005] It is an object of the present invention to provide an induction cooking hob having a winding arrangement with different winding concentrations, wherein said induction cooking hob allows a uniform heat distribution.

[0006] The object of the present invention is achieved by the induction cooking hob according to claim 1.

[0007] According to the present invention

• the base plate includes at least one conductive portion and at least one non-conductive portion,
• at least one conductive portion of the base plate is arranged above at least one portion of high winding concentration of the winding arrangement,
• at least one non-conductive portion of the base plate is arranged above at least one portion of low winding concentration of the winding arrangement,
• the conductive portion of the base plate is made by at least one conductive material, and
• the non-conductive portion of the base plate is made by at least one non-conductive material and/or formed by at least one cut-out in the base plate.

[0008] The core of the present invention is that the non-conductive portion of the base plate is arranged above a portion of low winding concentration of the winding arrangement, while the conductive portion of the base plate is made by at least one conductive material. The conductive portion of the base plate reacts locally to the magnetic field generated by the portion of high winding concentration of the winding arrangement, so that the coupling between the magnetic field and matter being heated by said magnetic field is reduced. In contrast, the non-conductive portion of the base plate does not react to the magnetic field generated by the portion of low winding concentration of the winding arrangement, so that the coupling between the magnetic field and the matter being heated by said magnetic field remains unchanged. This results in a uniform heat distribution in the matter being heated by the magnetic field.

[0009] Preferably, the base plate covers one winding arrangement or more adjacent winding arrangements.

[0010] According to a preferred embodiment of the present invention the ground area of the winding arrangement includes at least one acute angle. In the portion of the acute angle only low winding concentration of the winding arrangement is possible.

[0011] In particular, the ground area of the winding arrangement has a triangular shape including two or three acute angles.

[0012] Further, the triangular ground area of the winding arrangement may include one right angle.

[0013] For example, the induction coil comprises at least one pair of winding arrangements including one right angle, wherein said pair of winding arrangements comprises a square or rectangular ground area.

[0014] In this case, the pair of winding arrangements is covered by one square or rectangular base plate.

[0015] Moreover, a plurality of pairs of winding arrangements may be arranged in a row or as a matrix.

[0016] In particular, the conductive material of the base plate includes metal, preferably aluminium.

[0017] Further, the non-conductive material of the base plate may include mica.

[0018] For example, the base plate is made of a mica sheet, wherein the conductive portion of said base plate is formed by conductive windings made of litz wire and deposited on said mica sheet.

[0019] According to another embodiment the base plate is made of metal, preferably aluminium, and the non-conductive portion is formed by a plurality of cut-outs in said base plate.

[0020] Preferably, the non-conductive portion is formed by a plurality of slots and/or holes.

[0021] Furthermore, the base plate may include a plurality of ferrite elements, wherein the concentration of said ferrite elements in the non-conductive portion is higher than in the conductive portion. The ferrite elements increase the coupling between the magnetic field and the matter being heated by said magnetic field.

[0022] Novel and inventive features of the present invention are set forth in the appended claims.

[0023] The present invention will be described in further detail with reference to the drawing, in which

FIG 1

illustrates a schematic top view of a base plate for the induction coil according to a first embodiment of the present invention,

FIG 2

illustrates a schematic top view of a winding arrangement for the induction coil according to a preferred embodiment of the present invention,

FIG 3

illustrates a schematic top view of the base plate for the induction coil according to a second embodiment of the present invention,

FIG 4

illustrates a schematic sectional side view of the base plate for the induction coil according to a first example of the first embodiment of the present invention,

FIG 5

illustrates a schematic sectional side view of the base plate for the induction coil according to a second example of the first embodiment of the present invention,

FIG 6

illustrates a schematic sectional side view of the base plate for the induction coil according to a third example of the first embodiment of the present invention,

FIG 7

illustrates a schematic sectional side view of a pair of base plates for the induction coil according to a third embodiment of the present invention,

FIG 8

illustrates a schematic top view of the base plate for the induction coil according to a fourth embodiment of the present invention,

FIG 9

illustrates a schematic top view of two base plates for the induction coil according to a fifth embodiment of the present invention, and

FIG 10

illustrates a schematic top view of a formation of eight winding arrangements according to the preferred embodiment of the present invention.

[0024] FIG 1 illustrates a schematic top view of a base plate 10 for the induction coil according to a first embodiment of the present invention. In this example, the ground area of the base plate 10 is triangular and includes one right angle and two acute angles. The triangular base plate 10 may be equilateral. In general, the ground area of the base plate 10 may have an arbitrary shape, but at least one acute angle.

[0025] The base plate 10 includes a conductive portion 14 and a non-conductive portion 16. The conductive portion 14 extends over the environment of the right angle. The non-conductive portion 16 extends over the environments of the acute angles. The conductive portion 14 is made of at least one conductive material, while the non-conductive portion 16 is made of at least one dielectric material. For example, the conductive portion 14 is made of aluminium and the non-conductive portion 16 is made of mica.

[0026] FIG 2 illustrates a schematic top view of a winding arrangement 12 for the induction coil according to a preferred embodiment of the present invention.

[0027] The winding arrangement 12 has substantially the same ground area as the base plate 10 in FIG 1. The winding arrangement 12 is triangular and includes one right angle and two acute angles. The winding arrangement 12 includes a portion of high winding concentration 18 in the environment of the right angle. Further, the winding arrangement 12 includes two portions of low winding concentration 20 in the environments of the both acute angles.

[0028] Within the induction coil the base plate 10 of FIG 1 is congruent with the winding arrangement 12 of FIG 2. If the induction coil is a part of an induction cooking hob, then the base plate 10 of FIG 1 is arranged above and covers the winding arrangement 12 of FIG 2. Thereby, the conductive portion 14 of the base plate 10 covers the portion of high winding concentration 18 of the winding arrangement 12. In a similar way, the non-conductive portion 16 of the base plate 10 covers the portions of low winding concentration 20 of the winding arrangement 12.

[0029] The conductive portion 14 of the base plate 10 reacts locally to the magnetic field generated by the portion of high winding concentration 18 of the winding arrangement 12, so that the coupling between the magnetic field and matter being heated by said magnetic field is reduced. In contrast, the non-conductive portions 16 of the base plate 10 do not react to the magnetic field generated by the portion of low winding concentration 20 of the winding arrangement 12, so that the coupling between the magnetic field and the matter being heated by said magnetic field remains unchanged. This allows a uniform heat distribution. For example, the matter being heated by the magnetic field is the bottom of a cooking pot.

[0030] FIG 3 illustrates a schematic top view of the base plate 10 for the induction coil according to a second embodiment of the present invention.

[0031] The base plate 10 of the second embodiment is substantially the same as the base plate 10 shown in FIG 1, but comprises additionally a number of ferrite elements 22. In this example, the base plate 10 comprises nine ferrite elements 22. The ferrite elements 22 are arranged above the base plate 10. The spatial density of the ferrite elements 22 above the conductive portion 14 of the base plate 10 is smaller than their spatial density above the non-conductive portions 16 of said base plate 10. The ferrite elements 22 are concentrated above the non-conductive portions 16 of the base plate 10. The ferrite elements 22 increase the coupling between the magnetic field and the matter being heated by said magnetic field.

[0032] FIG 4 illustrates a schematic sectional side view of the base 10 plate for the induction coil according to a first example of the first embodiment of the present invention. In this example, the conductive material is integrated inside a sheet made of dielectric material. The conductive material inside the dielectric material extends over the conductive portion 14 of the base plate 10. In the non-conductive portion 16 the sheet made of dielectric material does not contain any conductive material. For example, the dielectric material is mica, while the conductive material is litz wire inside the sheet made of mica. In this example, the layer thickness of the conductive material is marginally smaller than the layer thickness of the sheet made of dielectric material.

[0033] FIG 5 illustrates a schematic sectional side view of the base plate 10 for the induction coil according to a second example of the first embodiment of the present invention. In this example, the conductive material is arranged inside and below the sheet made of dielectric material. The conductive material inside and below the dielectric material extends over the conductive portion 14 of the base plate 10, while the dielectric material in the non-conductive portion 16 of the base plate 10 does not contain any conductive material. In this example, the conductive material has about the double layer thickness as the sheet made of dielectric material.

[0034] FIG 6 illustrates a schematic sectional side view of the base plate 10 for the induction coil according to a third example of the first embodiment of the present invention. In this example, the conductive material is integrated inside an upper portion of the sheet made of dielectric material. The conductive material inside the dielectric material extends over the conductive portion 14 of the base plate 10. In the non-conductive portion 16 the sheet made of dielectric material does not contain any conductive material. In this example, the conductive material has about the half layer thickness as the sheet made of dielectric material.

[0035] FIG 7 illustrates a schematic sectional side view of a pair of base plates 10 for the induction coil according to a third embodiment of the present invention. In the third embodiment the pair of base plates 10 is used instead of one single base plate. The base plates 10 have the same ground areas and are arranged on top of each other. The conductive material is attached at the bottom side of an upper base plate 10 and upon the top side of a lower base plate 10. The conductive material is arranged below the upper base plate 10 and upon the lower base plate 10. The conductive materials attached at the base plates 10 extend over the conductive portions 14 of said base plates 10, while the dielectric materials in the non-conductive portions 16 of the base plates 10 are not coated by any conductive material.

[0036] FIG 8 illustrates a schematic top view of the base plate 10 for the induction coil according to a fourth embodiment of the present invention. The base plate 10 has a triangular ground area. In particular, the base plate 10 is provided for covering the winding arrangement 12 shown in FIG 2.

[0037] The base plate 10 is made of one or more conductive materials, e.g. aluminium. The base plate 10 includes a plurality of slots 24. The slots 24 in the base plate of the fourth embodiment are arranged in a portion corresponding with the non-conductive portions 16 of the base plates 10 of the first and second embodiments. The portion of the base plate 10 of the fourth embodiment without slots 24 corresponds with the conductive portions 14 of the base plates 10 of the first and second embodiments. In contrast, the portion of the base plate 10 of the fourth embodiment with slots 24 corresponds with the non-conductive portions 16 of the base plates 10 of the first and second embodiments. The base plate 10 of the fourth embodiment includes the slots 24 instead the dielectric material the first and second embodiments.

[0038] The portion of the base plate 10 with slots 24 reacts locally to the magnetic field generated by the portion of high winding concentration 18 of the winding arrangement 12, so that the coupling between the magnetic field and matter being heated by said magnetic field is reduced. In contrast, the portion of the base plate 10 with the slots 24 do not or less react to the magnetic field generated by the portion of low winding concentration 20 of the winding arrangement 12, so that the coupling between the magnetic field and the matter being heated by said magnetic field remains unchanged. The arrangement of the slots 24 allows a uniform heat distribution.

[0039] Furthermore, the slots 24 may be combined with the non-conductive portions 16. Thus, the base plate 10 may include the non-conductive portions 16 made of dielectric material as well as the slots 24. The dielectric material and the slots 24 have similar effects in view of the magnetic field.

[0040] FIG 9 illustrates a schematic top view of two base plates 10 for the induction coil according to a fifth embodiment of the present invention. The both base plates 10 in FIG 9 differ in the details of the geometric arrangements of the slots 24. However, the both base plates 10 in FIG 9 cause substantially the same physical effect.

[0041] The base plates 10 in FIG 9 have square shapes. Each square base plate 10 in FIG 9 corresponds with two composite triangular base plates 10 of FIG 8. In particular, each base plate 10 in FIG 9 is provided for covering two triangular winding arrangements 12 shown in FIG 2, wherein said winding arrangements 12 are arranged side-by-side, so that they form a square ground area.

[0042] FIG 10 illustrates a schematic top view of a formation of eight winding arrangements 12 according to the preferred embodiment of the present invention. Four pairs of winding arrangements 12 are arranged as a two-by-two matrix. Each pair of winding arrangements 12 form a square ground area. The square base plates 10 of FIG 9 are provided for covering a pair of winding arrangements 12 in each case and/or the triangular base plates 10 of FIG 1, 2, 3 and/or 8 are provided for covering a single winding arrangements 12 in each case.

List of reference numerals

[0043] 

10

base plate

12

windings

14

conductive portion

16

non-conductive portion

18

portion of high winding concentration

20

portion of low winding concentration

22

ferrite element

24

slot

Claims

1. An induction cooking hob comprising at least one base plate (10) and at least one winding arrangement (12), wherein:

- the winding arrangement (12) includes at least one portion of high winding concentration (18) and at least one portion of low winding concentration (20), and

- the base plate (10) is arranged above one or more winding arrangements (12),

characterized in that

- the base plate (10) includes at least one conductive portion (14) and at least one non-conductive portion (16),

- at least one conductive portion (14) of the base plate (10) is arranged above at least one portion of high winding concentration (18) of the winding arrangement (12),

- at least one non-conductive portion (16) of the base plate (10) is arranged above at least one portion of low winding concentration (20) of the winding arrangement (12),

- the conductive portion (14) of the base plate (10) is made by at least one conductive material, and

- the non-conductive portion (16) of the base plate (10) is made by at least one non-conductive material and/or formed by at least one cut-out (24) in the base plate (10) .

2. The induction cooking hob according to claim 1,
characterized in that
the base plate (10) covers one winding arrangement (12) or more adjacent winding arrangements (12).

3. The induction cooking hob according to claim 1 or 2,
characterized in that
the ground area of the winding arrangement (12) includes at least one acute angle.

4. The induction cooking hob according to any one of the preceding claims,
characterized in that
the ground area of the winding arrangement (12) has a triangular shape including two or three acute angles.

5. The induction cooking hob according to claim 4,
characterized in that
the ground area of the winding arrangement (12) includes one right angle.

6. The induction cooking hob according to claim 5,
characterized in that
the induction coil comprises at least one pair of winding arrangements (12) including one right angle, wherein said pair of winding arrangements (12) comprises a square or rectangular ground area.

7. The induction cooking hob according to claim 6 or 7,
characterized in that
the pair of winding arrangements (12) is covered by one square or rectangular base plate (10).

8. The induction cooking hob according to claim 6 or 7,
characterized in that
a plurality of pairs of winding arrangements (12) are arranged in a row or as a matrix.

9. The induction cooking hob according to any one of the preceding claims,
characterized in that
the conductive material of the base plate (10) includes metal, preferably aluminium.

10. The induction cooking hob according to any one of the preceding claims,
characterized in that
the non-conductive material of the base plate (10) includes mica.

11. The induction cooking hob according to any one of the preceding claims,
characterized in that
the base plate (10) is made of a mica sheet, wherein the conductive portion (14) of said base plate (10) is formed by conductive windings made of litz wire and deposited on said mica sheet.

12. The induction cooking hob according to any one of the claims 1 to 9,
characterized in that
the base plate (10) is made of metal, preferably aluminium, and the non-conductive portion (16) is formed by a plurality of cut-outs (24) in said base plate (10).

13. The induction cooking hob according to claim 12,
characterized in that
the non-conductive portion (16) is formed by a plurality of slots (24) and/or holes.

14. The induction cooking hob according to any one of the preceding claims,
characterized in that
the base plate (10) includes a plurality of ferrite elements (22), wherein the concentration of said ferrite elements (22) in the non-conductive portion (16) is higher than in the conductive portion (14).

Ansprüche

1. Induktionsherd, der mindestens eine Basisplatte (10) und mindestens eine Wickelanordnung (12) umfasst, wobei:

- die Wickelanordnung (12) mindestens einen Abschnitt mit hoher Wickelkonzentration (18) und mindestens einen Abschnitt mit geringer Wickelkonzentration (20) umfasst, und

- die Basisplatte (10) über einer oder mehreren Wickelanordnungen (12) angeordnet ist,

dadurch gekennzeichnet, dass

- die Basisplatte (10) mindestens einen leitfähigen Abschnitt (14) und mindestens einen nichtleitfähigen Abschnitt (16) aufweist,

- mindestens ein leitfähiger Abschnitt (14) der Basisplatte (10) über mindestens einem Abschnitt mit hoher Wickelkonzentration (18) der Wickelanordnung (12) angeordnet ist,

- mindestens ein nichtleitfähiger Abschnitt (16) der Basisplatte (10) über mindestens einem Abschnitt mit geringer Wickelkonzentration (20) der Wickelanordnung (12) angeordnet ist,

- der leitfähige Abschnitt (14) der Basisplatte (10) aus mindestens einem leitfähigen Material hergestellt ist, und

- der nichtleitfähige Abschnitt (16) der Basisplatte (10) aus mindestens einem nichtleitfähigen Material hergestellt ist und/oder von mindestens einem Ausschnitt (24) in der Basisplatte (10) gebildet wird.

2. Induktionsherd nach Anspruch 1, dadurch gekennzeichnet, dass die Basisplatte (10) eine Wickelanordnung (12) oder mehrere angrenzende Wickelanordnungen (12) abdeckt.

3. Induktionsherd nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Grundfläche der Wickelanordnung (12) mindestens einen spitzen Winkel aufweist.

4. Induktionsherd nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Grundfläche der Wickelanordnung (12) eine dreieckige Form mit zwei oder drei spitzen Winkeln aufweist.

5. Induktionsherd nach Anspruch 4, dadurch gekennzeichnet, dass die Grundfläche der Wickelanordnung (12) einen rechten Winkel aufweist.

6. Induktionsherd nach Anspruch 5, dadurch gekennzeichnet, dass die Induktionsspule mindestens ein Paar Wickelanordnungen (12) mit einem rechten Winkel umfasst, wobei das Paar Wickelanordnungen (12) eine quadratische oder rechteckige Grundfläche umfasst.

7. Induktionsherd nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass das Paar Wickelanordnungen (12) von einer quadratischen oder rechteckigen Basisplatte (10) abgedeckt wird.

8. Induktionsherd nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass mehrere Paare von Wickelanordnungen (12) in einer Reihe oder als ein Rastermuster angeordnet sind.

9. Induktionsherd nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das leitfähige Material der Basisplatte (10) Metall, vorzugsweise Aluminium, beinhaltet.

10. Induktionsherd nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das nichtleitfähige Material der Basisplatte (10) Glimmer beinhaltet.

11. Induktionsherd nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Basisplatte (10) aus einer Glimmerplatte hergestellt ist, wobei der leitfähige Abschnitt (14) der Basisplatte (10) von leitfähigen Wicklungen gebildet wird, die aus Litzendraht hergestellt sind und auf der Glimmerplatte abgeschieden werden.

12. Induktionsherd nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Basisplatte (10) aus Metall, vorzugsweise Aluminium, hergestellt ist und der nichtleitfähige Abschnitt (16) von mehreren Ausschnitten (24) in der Basisplatte (10) gebildet wird.

13. Induktionsherd nach Anspruch 12, dadurch gekennzeichnet, dass der nichtleitfähige Abschnitt (16) von mehreren Schlitzen (24) und/oder Löchern gebildet wird.

14. Induktionsherd nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Basisplatte (10) mehrere Ferritelemente (22) aufweist, wobei die Konzentration der Ferritelemente (22) in dem nichtleitfähigen Abschnitt (16) höher ist als in dem leitfähigen Abschnitt (14).

Revendications

1. Plaque de cuisson à induction comprenant au moins une plaque de base (10) et au moins un agencement d'enroulement (12), dans laquelle :

- l'agencement d'enroulement (12) comprend au moins une partie de concentration d'enroulement élevée (18) et au moins une partie de faible concentration d'enroulement (20) et

- la plaque de base (10) est disposée au-dessus d'un ou de plusieurs agencements d'enroulement (12),

caractérisée en ce que

- la plaque de base (10) comprend au moins une partie conductrice (14) et au moins une partie non conductrice (16),

- au moins une partie conductrice (14) de la plaque de base (10) est disposée au-dessus d'au moins une partie de concentration d'enroulement élevée (18) de l'agencement d'enroulement (12),

- au moins une partie non conductrice (16) de la plaque de base (10) est disposée au-dessus d'au moins une partie de faible concentration d'enroulement (20) de l'agencement d'enroulement (12),

- la partie conductrice (14) de la plaque de base (10) est composée d'au moins un matériau conducteur et

- la partie non conductrice (16) de la plaque de base (10) est composée d'au moins un matériau non conducteur et/ou formée d'au moins une découpe (24) dans la plaque de base (10).

2. Plaque de cuisson à induction selon la revendication 1,
caractérisée en ce que
la plaque de base (10) recouvre un agencement d'enroulement (12) ou plusieurs agencements d'enroulement adjacents (12).

3. Plaque de cuisson à induction selon la revendication 1 ou 2,
caractérisée en ce que
la zone de mise à la terre de l'agencement d'enroulement (12) comprend au moins un angle aigu.

4. Plaque de cuisson à induction selon l'une quelconque des revendications précédentes,
caractérisée en ce que
la zone de mise à la terre de l'agencement d'enroulement (12) présente une forme triangulaire comprenant deux ou trois angles aigus.

5. Plaque de cuisson à induction selon la revendication 4,
caractérisée en ce que
la zone de mise à la terre de l'agencement de mise à la terre (12) comprend un angle droit.

6. Plaque de cuisson à induction selon la revendication 5,
caractérisée en ce que
la bobine d'induction comprend au moins une paire d'agencements d'enroulement (12) comprenant un angle droit, dans laquelle ladite paire d'agencements d'enroulement (12) comprend une zone de mise à la terre carrée ou rectangulaire.

7. Plaque de cuisson à induction selon la revendication 6 ou 7,
caractérisée en ce que
la paire d'agencements d'enroulement (12) est recouverte d'une plaque de base carrée ou rectangulaire (10).

8. Plaque de cuisson à induction selon la revendication 6 ou 7,
caractérisée en ce que
une pluralité de paires d'agencements d'enroulement (12) sont disposées dans une rangée ou sous la forme d'une matrice.

9. Plaque de cuisson à induction selon l'une quelconque des revendications précédentes,
caractérisée en ce que
le matériau conducteur de la plaque de base (10) comprend un métal, de préférence de l'aluminium.

10. Plaque de cuisson à induction selon l'une quelconque des revendications précédentes,
caractérisée en ce que
le matériau non conducteur de la plaque de base (10) comprend du mica.

11. Plaque de cuisson à induction selon l'une quelconque des revendications précédentes,
caractérisée en ce que
la plaque de base (10) est composée d'une feuille de mica, dans laquelle la partie conductrice (14) de ladite plaque de base (10) est formée d'enroulements conducteurs composée de fils de Litz et déposée sur ladite feuille de mica.

12. Plaque de cuisson à induction selon l'une quelconque des revendications 1 à 9,
caractérisée en ce que
la plaque de base (10) est composée d'un métal, de préférence d'aluminium, et la partie non conductrice (16) est formée d'une pluralité de découpes (24) dans ladite plaque de base (10).

13. Plaque de cuisson à induction selon la revendication 12,
caractérisée en ce que
la partie non conductrice (16) est formée par une pluralité de fentes (24) et/ou de trous.

14. Plaque de cuisson à induction selon l'une quelconque des revendications précédentes,
caractérisée en ce que
la plaque de base (10) comprend une pluralité d'éléments de ferrite (22), dans laquelle la concentration desdits éléments de ferrite (22) dans la partie non conductrice (16) est plus élevée que dans la partie conductrice (14).

Drawing